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Worksheetselectromagnets week 9
Total questions: 143
Worksheet time: 3hrs 40mins
When two like poles get together they....
attract
repel
When two unlike poles get together they...
attract
repel
Where is a magnet the strongest?
At the North pole.
It has the same strength all over the magnet.
At both poles.
At the South pole.
What is true about the North and South poles of a magnet?
When placed near each other, the poles will attract.
When placed near each other, the poles will repel.
Nothing will happen.
What would occur if you placed the South pole of a magnet near the South pole of a different magnet?
When placed near each other, the poles will attract.
When placed near each other, the poles will repel.
Nothing will happen.
Which objects are magnetic?
Nickel
Paper
Iron
Plastic
Which objects are non-magnetic?
Nickel
Paper
Iron
Plastic
What materials do you need to create an electromagnet?
Wire, lightbulb and a magnet
wire, battery and a pencil
wire, nail, and a lightbulb
wire, nail and a battery
What will make the strength of an electromagnet stronger?
A larger battery
Wrap more coils around the nail.
Use a smaller battery
Detach the wire.
What is true about the North and South poles of a magnet?
When placed near each other, the poles will attract.
When placed near each other, the poles will repel.
Nothing will happen.
What would occur if you placed the South pole of a magnet near the South pole of a different magnet?
When placed near each other, the poles will attract.
When placed near each other, the poles will repel.
Nothing will happen.
Which objects are non-magnetic?
Nickel
Paper
Iron
Plastic
What materials do you need to create an electromagnet?
Wire, lightbulb and a magnet
wire, battery and a pencil
wire, nail, and a lightbulb
wire, nail and a battery
When two unlike poles get together they...
attract
repel
When two like poles get together they....
attract
repel
When two unlike poles get together they...
attract
repel
Where is a magnet the strongest?
At the North pole.
It has the same strength all over the magnet.
At both poles.
At the South pole.
What is true about the North and South poles of a magnet?
When placed near each other, the poles will attract.
When placed near each other, the poles will repel.
Nothing will happen.
What would occur if you placed the South pole of a magnet near the South pole of a different magnet?
When placed near each other, the poles will attract.
When placed near each other, the poles will repel.
Nothing will happen.
Which objects are magnetic?
Nickel
Paper
Iron
Plastic
Which objects are non-magnetic?
Nickel
Paper
Iron
Plastic
What materials do you need to create an electromagnet?
Wire, lightbulb and a magnet
wire, battery and a pencil
wire, nail, and a lightbulb
wire, nail and a battery
What will make the strength of an electromagnet stronger?
A larger battery
Wrap more coils around the nail.
Use a smaller battery
Detach the wire.
This magnet has both a south pole and a north pole.
both
This type of magnet is a permanent magnet
both
This type of magnet requires electric current.
both
You can make this magnet stronger.
both
This magnet attracts objects made of metal.
both
This type of magnet is a temporary magnet.
both
In order to make an electromagnet stronger you __________.
take away one power source
wrap the wire around the rivet less times
wrap the wire around the rivet more times
wrap the wire around the rivet looser
In order to make an electromagnet stronger you ___________.
wrap the wire around the rivet looser
wrap the wire around the rivet tighter
wrap the wire around the rivet less times
take away one power source
A magnet that does not require a electrical current is called a _______________.
electromagnet
permanent magnet
light magnet
rivet magnet
A _____________ is a temporary magnet caused by an electric current being wrapped around iron or steel.
permanent magnet
electromagnet
light magnet
horseshoe magnet
What type of magnet that can turned on and off?
electromagnet
permanent magnet
electricity
battery
Magnets on refrigerator cannot be turned off. Which type of magnets they belong?
electromagnets
battery
permanent magnets
copper wire
Why doe the compass needle move when the electricity flows through the coiled wire?
Because a magnetic field is not produced, which do not attract to the needle.
Because a magnetic field is produced, which attracts the compass needle.
Because the battery produced magnetic field.
What are the components of the electromagnets?
battery, wire and bulb
battery , copper wire and paper clips
battery, copper wire and iron nail
battery, wire and aluminum
What is the role of the battery in the electromagnet?
It provides light energy for the electromagnet.
It provides magnetic field for the electromagnet.
It provides sound energy for the electromagnet.
It provides the power source for the electromagnet.
How can we control an electromagnet?
By turning the electricity on and off.
By turning the kinetic energy on and off.
What would happen if you took one end of the wire off the battery?
The nail will be a magnet.
The nail would no longer be a magnet
Nothing will happened.
The nail will heats up.
Which part of the electromagnets turned into a magnet when electricity flows through a coiled wire?
Battery
Copper wire
Iron Nail
Bulb
Which part of the electromagnet produces a magnetic field?
Battery
Coiled copper wire
Bulb
Iron nail
Which steps will you take to build an electromagnet?
First, wrap the wire around a nail. Next, attach the ends of the wire to a battery to make an electric circuit.
First, attach the ends of the wire to a battery to make an electric circuit. Next wrap the wire around a nail.
A student tested the items below to see if they stopped the conduction of electricity. Paper and a toothpick stopped the flow of electricity. Penny, metal clip, and a nail let the energy flow.
What is the best claim she can make from this evidence?
Wood is an insulator.
Nails are insulators.
Toothpicks are conductors.
Metal is an insulator.
A student put a beaker of water on top of the hot plate.
She turned on the hot plate (a portable burner used for cooking) and the water started boiling.
What most likely happened to explain this?
Electric energy changed to heat energy.
Heat energy changed to water energy.
Electric energy changed to gas energy.
Heat energy changed to a gas energy.
A student used a paper clip to complete the circuit. The bulb lit up. What is the best claim that can be made from this evidence?
The paper clip is an insulator.
The paper clip is a conductor.
The paper clip pushes the electric current.
The paper clip changes electric energy into light energy.
When a switch in a circuit is turned on, the light bulb lights.
It completed the circuit which allowed the electric current to flow.
It completed the circuit which allowed light energy to reach the bulb.
The switch pushed the electric current to the light bulb.
The switch changed electric energy into light energy.
Katie drew the model above to show how a magnet attracts nails. Why did she most likely draw the nails where she did?
Magnets are stronger in the middle.
Magnets are stronger at the poles.
Magnets repel nails in the middle.
Magnets repel nails at the poles.
Which one of the devices below can transform electric energy into light and sound energy?
A fan
A computer
A battery
An iron
A student tested several different items to see if they conducted electricity. Which item could be used to complete an electric circuit?
rubber band
screw
board
plastic straw
Sam felt hot one summer day. He plugged in a fan and turned it on. The fan blew the air and cooled him off.
How did the fan make the air move?
Heat energy transformed into cool energy.
Heat energy transformed into wind energy.
Electric energy transformed into energy of motion.
Electric energy transformed into cool energy.
A student wants to make the electromagnet she made STRONGER. Which of the following is most likely to make it stronger?
Use a longer wire.
Remove the nail.
Add another battery
Use a shorter wire.
A student tested the strength of several electromagnets. Which one is more likely the strongest?
One battery, 10 turns
Three batteries, 10 turns
Two batteries, 20 turns
Three batteries, 20 turns
A student wants to find out how the type of core affects the strength of an electromagnet. Her procedure is shown below.
1.) Make two electromagnets
2.) One electromagnet will have 2 batteries and an iron core.
3.) The other one will have 1 battery and a plastic core.
4.) Test the strength of the electromagnets by picking up paper clips.
Is this a fair test?
No, because there is no responding variable.
No, because there are too many manipulated variables.
Yes, because there is a responding variable.
Yes, because there are two manipulated variables.
A student measured the strength of four electromagnets with different cores. Below are the results.
No Core - Picked up 1 paper clip
Iron Core- Picked up 4 paper clips
Plastic Core- Picked up 1 paper clip
Glass Core- Picked up 1 paper clip
What is the best claim that can be made from this evidence?
Glass attracts paper clips.
Plastic attracts paper clips.
Iron cores make electromagnets stronger.
Plastic cores make electromagnets stronger.
Jim drew a picture to represent a device he built.
A battery with a wire coil wrapped around a steel nail with paper clips hanging from the steel nail.
Why did he most likely include the paper clips in his drawings?
To show that it is an electromagnet.
To show that is makes electricity.
To show that it creates energy.
To show that it makes heat.
What is the most important purpose of a switch?
To conduct the electric current.
To open and close the circuit.
To push the current through the circuit.
To change electric energy into light energy.
Sally wants to test the effects of adding more batteries on the strength of an electromagnet. She makes an elecromagnet by wrapping a wire about three nails. She will measure the strength by counting the number of paper clips it will pick up. What should she use as her manipulated variable?
Number of paper clips picked up.
Number of batteries.
Number of coils.
Number of nails in the core.
A student measured the strength of four electromagnets with different cores. Here are the results:
No core 1 paperclip
Iron core 4 paperclips
Plastic core 1 paperclip
Glass core 1 paperclip
What is the BEST claim that can be made from the evidence?
Glass attracts paper clips.
Plastic attracts paper clips.
Iron cores make the electromagnet stronger.
Plastic cores make the electromagnet stronger.
A student tested the items below to see if they stopped the conduction of electricity. Paper and a toothpick stopped the flow of electricity. Penny, metal clip, and a nail let the energy flow.
What is the best claim she can make from this evidence?
Wood is an insulator.
Nails are insulators.
Toothpicks are conductors.
Metal is an insulator.
A student put a beaker of water on top of the hot plate.
She turned on the hot plate (a portable burner used for cooking) and the water started boiling.
What most likely happened to explain this?
Electric energy changed to heat energy.
Heat energy changed to water energy.
Electric energy changed to gas energy.
Heat energy changed to a gas energy.
A student used a paper clip to complete the circuit. The bulb lit up. What is the best claim that can be made from this evidence?
The paper clip is an insulator.
The paper clip is a conductor.
The paper clip pushes the electric current.
The paper clip changes electric energy into light energy.
When a switch in a circuit is turned on, the light bulb lights.
It completed the circuit which allowed the electric current to flow.
It completed the circuit which allowed light energy to reach the bulb.
The switch pushed the electric current to the light bulb.
The switch changed electric energy into light energy.
Katie drew the model above to show how a magnet attracts nails. Why did she most likely draw the nails where she did?
Magnets are stronger in the middle.
Magnets are stronger at the poles.
Magnets repel nails in the middle.
Magnets repel nails at the poles.
Which one of the devices below can transform electric energy into light and sound energy?
A fan
A computer
A battery
An iron
A student tested several different items to see if they conducted electricity. Which item could be used to complete an electric circuit?
rubber band
screw
board
plastic straw
Sam felt hot one summer day. He plugged in a fan and turned it on. The fan blew the air and cooled him off.
How did the fan make the air move?
Heat energy transformed into cool energy.
Heat energy transformed into wind energy.
Electric energy transformed into energy of motion.
Electric energy transformed into cool energy.
A student wants to make the electromagnet she made STRONGER. Which of the following is most likely to make it stronger?
Use a longer wire.
Remove the nail.
Add another battery
Use a shorter wire.
A student tested the strength of several electromagnets. Which one is more likely the strongest?
One battery, 10 turns
Three batteries, 10 turns
Two batteries, 20 turns
Three batteries, 20 turns
A student wants to find out how the type of core affects the strength of an electromagnet. Her procedure is shown below.
1.) Make two electromagnets
2.) One electromagnet will have 2 batteries and an iron core.
3.) The other one will have 1 battery and a plastic core.
4.) Test the strength of the electromagnets by picking up paper clips.
Is this a fair test?
No, because there is no responding variable.
No, because there are too many manipulated variables.
Yes, because there is a responding variable.
Yes, because there are two manipulated variables.
A student measured the strength of four electromagnets with different cores. Below are the results.
No Core - Picked up 1 paper clip
Iron Core- Picked up 4 paper clips
Plastic Core- Picked up 1 paper clip
Glass Core- Picked up 1 paper clip
What is the best claim that can be made from this evidence?
Glass attracts paper clips.
Plastic attracts paper clips.
Iron cores make electromagnets stronger.
Plastic cores make electromagnets stronger.
Jim drew a picture to represent a device he built.
A battery with a wire coil wrapped around a steel nail with paper clips hanging from the steel nail.
Why did he most likely include the paper clips in his drawings?
To show that it is an electromagnet.
To show that is makes electricity.
To show that it creates energy.
To show that it makes heat.
What is the most important purpose of a switch?
To conduct the electric current.
To open and close the circuit.
To push the current through the circuit.
To change electric energy into light energy.
Sally wants to test the effects of adding more batteries on the strength of an electromagnet. She makes an elecromagnet by wrapping a wire about three nails. She will measure the strength by counting the number of paper clips it will pick up. What should she use as her manipulated variable?
Number of paper clips picked up.
Number of batteries.
Number of coils.
Number of nails in the core.
A student measured the strength of four electromagnets with different cores. Here are the results:
No core 1 paperclip
Iron core 4 paperclips
Plastic core 1 paperclip
Glass core 1 paperclip
What is the BEST claim that can be made from the evidence?
Glass attracts paper clips.
Plastic attracts paper clips.
Iron cores make the electromagnet stronger.
Plastic cores make the electromagnet stronger.
This type of magnet is a temporary magnet.
both
In order to make an electromagnet stronger you __________.
take away one power source
wrap the wire around the rivet less times
wrap the wire around the rivet more times
wrap the wire around the rivet looser
What is the role of the battery in the electromagnet?
It provides light energy for the electromagnet.
It provides magnetic field for the electromagnet.
It provides sound energy for the electromagnet.
It provides the power source for the electromagnet.
How can we control an electromagnet?
By turning the electricity on and off.
By turning the kinetic energy on and off.
What type of magnet that can turned on and off?
electromagnet
permanent magnet
electricity
battery
Definition = The area around the magnet that feels the effect of the magnet.
(a)
Name the 3 magnetic materials
(a)
Name the 2 magnetic poles
(a)
What is the direction of the magnetic field
(a)
Defintion = when two objects move apart
(a)
Definition = when two ojects move closer together
(a)
Name the equipment = An object that contains an iron core in a current carrying coil of wire
(a)
Name the equipment = A current carrying coil of wire
(a)
What is the rule when like poles are brought together?
Like poles attract
Like poles repel
What is the rule when 2 unlike poles are brought together?
Unlike poles attract
Unlike poles repel
Which of the following does NOT increase the strength of the electromagnet
Increase the the size of the current
Increase the number of coils
Use a copper core
Use an iron core
What type of magnet that can turned on and off?
electromagnet
permanent magnet
electricity
battery
Who invented the doorbell?
Leonard Door
Joseph Henry
When was the doorbell invented?
1831
1776
What makes a doorbell work?
a chain or string
an electromagnet
Why are electromagnets useful?
They are very small.
They can be controlled.
What is an electromagnet?
a very rare magnet
a human-made magnet
What are the two parts of an electromagnet?
human and metal
electricity and metal
What does the circuit do?
it pulls a string or chain
it turns on an electromagnet
What causes the doorbell to ring?
chemical force
magnetic force
What happens when a doorbell is pushed?
it pulls a string or chain
it completes a circuit
Where are the electromagnets used in homes?
in doorbells
in sofas
In order to magnetize an object for electromagnetism, it needs to have iron or steel (ex. a rod or nail).
True
False
Electromagnets do NOT have a north and south pole.
True
False
Electromagnets can be turned on and off.
True
False
Electromagnets need a power source.
True
False
Electromagnets can be made stronger.
True
False
Which item was NOT used when creating our electromagnet?
Nail
Wire (coils)
Magnet
Battery
Electricity is needed for electromagnets.
True
False
Electromagnets are ONLY used to pick up junk (such as old cars and metal scraps).
True
False
Electromagnets are permanent magnets.
True
False
A permanent magnet can lose its magnetism.
True
False
A(n) ______________ is produced when an electrical current passes through a coil of wire wrapped around any core that can be magnetized.
electric circuit
electromagnet
magnetic field
light bulb
When an electrical current is running through the wire in an electromagnet, the magnetic core produces a _______________.
magnetic field
simple circuit
magnet circuit
battery
Which of the following will attract a magnetic force?
Two magnets with both N & N facing each other
Two magnets with both S & S facing each other
Two magnets with N & S facing each other
Magnets will always attract regardless of the direction of the poles.
Which of the following will repel a magnetic force? Select ALL that apply:
Two magnets with both N & N facing each other
Two magnets with both S & S facing each other
Two magnets with N & S facing each other
Magnets will always attract regardless of the direction of the poles.
Select ALL of the materials that can be used to create an electromagnet:
conductive wire
wooden insulator
battery
iron nail/bolt
plastic straw
Magnets and electromagnets have the following unique properties:
strength, attraction, repulsion, magnetism
strength, attraction, electricity, magnetism
polarity, electricity, magnetism, attraction
polarity, repulsion, strength, attraction
Magnets attract certain types of
wood, such as sticks, logs, and pencils
plastic, such as straws, bags, and toys
metals, such as iron, nickel, and steel
all of the above
True or False:
Like poles attract each other, while unlike poles repel each other.
True
False; opposite poles attract
Which of the following would most likely make an electromagnet stronger?
Adding another battery
Using a longer wire
Removing the nail
Wrapping the wire loosely around the nail
Where is the magnetic pull or attraction the strongest on a magnet?
At the center of the magnet
At its poles
Only on one pole
It is the same strength everywhere
When iron nails or steel paper clips are held near a magnet, they will
not move at all
move away, or repel from the magnet
move toward, or be attracted to, the magnet
move toward, or repel from the magnet
True or false: Some magnets have a greater strength than other magnets.
True
False; all magnets strength are created equally.
How can you compare the strength of an electromagnet?
By counting the amount of objects the magnet can pick up.
By looking at different electromagnets and choosing the prettiest one.
By changing multiple variables within an experiment.
Every electromagnet has the same strength.
Keyla planned an investigation to test the strength of electromagnets. In one electromagnet she used one battery and a bolt with a thicker core. In the other electromagnet she used two batteries and a thinner core.
Was this a fair test?
Yes, because she tested the correct number of variables.
Yes, because the number of batteries does not matter.
No, because she changed more than one variable.
No, because the number of batteries does not matter.
Explain how an electromagnet creates energy in order to magnetize a bolt or nail to pick up paperclips.
The paper clips are magnets.
The electric current in the circuit magnetizes the nail.
The electric current in the circuit melts the nail.
The nail heats up causing it to become a magnet.
A student designed an experiment in order to create an electromagnet. Below are the procedures in the experiment:
- Make one electromagnet with one battery and the other with two batteries.
- Use the same size bolt for each electromagnet.
- Wrap the wire around the bolts the same number of times.
- Measure the strength of each electromagnet by picking up paperclips.
What is the manipulated variable in her investigation?
The same size bolt
The number of wire coils around the bolt
The number of batteries used
The number of paperclips the electromagnet picks up
Why would an electromagnet with an iron core pick up more paperclips than an electromagnet with a plastic core?
Iron cores make electromagnets stronger.
Plastic cores make electromagnets stronger.
Iron cores are insulators of energy.
It does not matter what material the core of an electromagnet is.
The controlled variable(s) in an experiment
stay the same and remain unchanged throughout the entire investigation.
change throughout the investigation.
can change or stay the same depending on the investigation.
is what happens as a result of the investigation.
The manipulated or independent variable in an experiment
stays the same and remains unchanged throughout the entire investigation.
changes throughout the investigation.
can change or stay the same depending on the investigation.
is what happens as a result of the investigation.
The responding variable(s) in an experiment
stays the same and remains unchanged throughout the entire investigation.
changes throughout the investigation.
can change or stay the same depending on the investigation.
is what happens as a result of the investigation.
